XML external entity (XXE) vulnerability in admin/api.php in GetSimple CMS 3.1.1 through 3.3.x before 3.3.5 Beta 1, when in certain configurations, allows remote attackers to read arbitrary files via the data parameter.
GetSimple CMS 3.3.4 allows remote attackers to obtain sensitive information via a direct request to (1) data/users/<username>.xml, (2) backups/users/<username>.xml.bak, (3) data/other/authorization.xml, or (4) data/other/appid.xml.
GetSimple CMS 3.3.4 allows remote attackers to obtain sensitive information via a direct request to (1) plugins/anonymousdata.php or (2) plugins/InnovationPlugin.php, which reveals the installation path in an error message.